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Tweak comment in PgsDecoder to match the structure of the data

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The Palette Definition Segment is documented here, you can is it goes:
luminance (y), red (cr), blue (cb), alpha

http://blog.thescorpius.com/index.php/2017/07/15/presentation-graphic-stream-sup-files-bluray-subtitle-format/

(I think it's important to be really precise here, because YCbCr is a
very common format, so this ordering is slightly unusual:
https://en.wikipedia.org/wiki/YCbCr)

PiperOrigin-RevId: 350747808
This commit is contained in:
ibaker 2021-01-08 13:50:03 +00:00 committed by Ian Baker
parent 04250031bc
commit b1cf04f22c
1 changed files with 1 additions and 1 deletions
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2
library/core/src/main/java/com/google/android/exoplayer2/text/pgs/PgsDecoder.java
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@ -134,7 +134,7 @@ public final class PgsDecoder extends SimpleSubtitleDecoder {
private void parsePaletteSection(ParsableByteArray buffer, int sectionLength) { private void parsePaletteSection(ParsableByteArray buffer, int sectionLength) {
if ((sectionLength % 5) != 2) { if ((sectionLength % 5) != 2) {
// Section must be two bytes followed by a whole number of (index, y, cb, cr, a) entries. // Section must be two bytes then a whole number of (index, Y, Cr, Cb, alpha) entries.
return; return;
} }
buffer.skipBytes(2); buffer.skipBytes(2);